How to power a 12v Led Neon Strip Indoors?
I bought a 12v LED Neon Strip from ebay, it is the same as this:
led "flexible strip"
I don't know how to power it, it says t is 12v led lighting for cars, but also says on the back of smd-5050 the cover that it can be used indoors to.

your PC power supply has 12 volt lines going to the hard drive, that's a pretty common way to power LEDs. Another alternative is to just use an old power supply from a discarded electronic gadget like an old router or whatever you can find at 12v. I probably ~20 just laying around, you just need to make sure it is the right amperage.

or just buy the right one:
http://www.ledstrips8.com/wholesale/category/led-light-accessories/led-power-supplies/